[IMPALA-3606] Java npe when adding a partition which already exists

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Impala 2.5.0
• Fix Version/s: Impala 2.7.0
• Component/s: Catalog
• Labels: catalog-server ramp-up
• Assignee: Bikramjeet Vig
• Reporter: Huaisi Xu
• Created: 24/May/16 17:31
• Updated: 14/Feb/17 15:28
• Resolved: 12/Jul/16 23:16

Description

Repro:

create external table if not exists at (
id string, bool_col string, i string, s string, ic string, bi string, f string, d string, da string, sc string, ts string) 
partitioned by (year int, month int) 
location '/test-warehouse/alltypesrror';

and do this twice:

alter table at add if not exists partition (year=2000, month=1);

E0524 10:28:53.734863 29263 ImpaladCatalog.java:134] Error adding catalog object: null
Java exception follows:
java.lang.NullPointerException
	at com.cloudera.impala.catalog.ImpaladCatalog.addTable(ImpaladCatalog.java:350)
	at com.cloudera.impala.catalog.ImpaladCatalog.addCatalogObject(ImpaladCatalog.java:246)
	at com.cloudera.impala.catalog.ImpaladCatalog.updateCatalog(ImpaladCatalog.java:132)
	at com.cloudera.impala.service.Frontend.updateCatalogCache(Frontend.java:227)
	at com.cloudera.impala.service.JniFrontend.updateCatalogCache(JniFrontend.java:161)

I think impalad does not handle catalog update response 100% correctly, but this should not affect any other queries. (everything is fine)